Did you know that nearly half of Americans have at least one risk factor for heart disease, such as high blood pressure, obesity, physical inactivity, or an unhealthy diet? Risk also increases with age. Millions of Americans live with heart disease, a cardiovascular condition, or stroke. We all can help improve lives through research, education and emergency care. Here are eight quick facts about heart disease brought to you by the American Heart Association, the Center for Disease Control and American Consultants.